XML 46 R33.htm IDEA: XBRL DOCUMENT v3.25.1

Electric utility segment (Tables)

3 Months Ended

Mar. 31, 2025

Electric Utility Subsidiary [Abstract]

Schedule of Purchases From All IPPs

Purchases from all IPPs were as follows:

																		Three months ended March 31
(in millions)																														2025						2024
Kalaeloa Partners, L.P.																														$	59					$	66
HPOWER																														19						17
Puna Geothermal Venture																														13						13
Hamakua Energy																														5						11
Kapolei Energy Storage																														6						6
Wind IPPs																														21						30
Solar IPPs																														22						15
Other IPPs 1																														2						2
Total IPPs																														$	147					$	160

1 Includes hydro power and other PPAs.

Schedule of PIM Rewards

The following PIMs and SSMs were approved by the PUC and are applicable to the 2024 evaluation period. There were no accruals for the 2025 evaluation period. PIMs and SSMs are determined at the end of

their evaluation period. Unless otherwise specified, the evaluation period is the 12‑month calendar year period ending December 31 over which measured performance is determined.

Performance Incentive Mechanisms			Maximum rewards/penalties $			2024 rewards (penalties) accrued
Transmission and Distribution-caused SAIDI/SAIFI PIMs			Maximum penalties of $3.6 million for 2024/2025			$(1.0) million
Call Center PIM			Maximum reward or penalty of $1.4 million			—
Phase 1 RFP PIM			Varies			$0.2 million
Renewable portfolio standard (RPS) PIM			$10/MWh for above interpolated statutory RPS goal $20/MWh for failing to meet RPS targets in 2030, 2040 and 2045			$1.9 million
Interconnection Approval PIM1			Maximum reward of $3.0 million or a total annual maximum penalty of $0.9 million			$2.4 million
Generation-caused SAIDI/SAIFI PIMs			Maximum penalties of approximately $1.0 million			$(0.1) million
Interconnection Requirements Study PIM			Varies			—
Collective Shared Savings Mechanism			20% share of savings when non-ARA costs in a performance year lower than target year non-ARA costs			$2.8 million
Total PIM rewards, net						$6.2 million

1    The Interconnection Approval PIM expired as of December 31, 2024.

Schedule of Net Annual Incremental Amounts Proposed to be Collected (Refunded)

The filing reflected ARA revenues for the second year recovery of the COVID-19 related deferred costs through the Z-factor and the accelerated return of the Enterprise Resource Planning system benefits savings to Hawaii Electric Light and Maui Electric customers as part of the customer dividend, as follows (See discussion under “Regulatory assets and liabilities” below):

(in millions)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Total
Recovery of COVID-19 related costs						$	2.2					$	0.5					$	0.5					$	3.2
Return of ERP benefit liability						—						(1.3)						(2.0)						(3.3)
Net 2025 ARA revenues						$	2.2					$	(0.8)					$	(1.4)					$	(0.1)

Note: Columns may not foot due to rounding.

The net incremental amounts between the 2024 fall and 2025 spring revenue reports are shown in the following table. The amounts are to be collected (refunded) from June 1, 2025, through May 31, 2026, under the RBA rate tariffs, which were included in the 2025 spring revenue report filing.

(in millions)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Total
Incremental Performance Incentive Mechanisms (net)						$	1.3					$	3.9					$	—					$	5.2
Incremental MPIR/EPRM revenue adjustment						(1.4)						(0.6)						(0.3)						(2.3)
Incremental Pilot Process cost recovery						(0.7)						—						(0.1)						(0.9)
Net incremental amount to be collected under the RBA rate tariffs						$	(0.8)					$	3.2					$	(0.5)					$	1.9

Note: Columns may not foot due to rounding.

Schedule of Condensed Consolidating Statements of Income

Condensed Consolidating Statement of Income

Three months ended March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Revenues						$	524,703					108,311						105,702						2,944						(3,294)						$	738,366
Expenses
Fuel oil						171,793						26,794						40,134						—						—						238,721
Purchased power						110,731						25,490						10,496						—						—						146,717
Other operation and maintenance						91,493						28,034						26,211						664						(3,294)						143,108
Depreciation						42,573						11,243						10,203						—						—						64,019
Taxes, other than income taxes						49,779						10,179						9,906						—						—						69,864
Total expenses						466,369						101,740						96,950						664						(3,294)						662,429
Operating income						58,334						6,571						8,752						2,280						—						75,937
Allowance for equity funds used during construction						2,795						347						443						—						—						3,585
Equity in earnings of subsidiaries						9,725						—						—						—						(9,725)						—
Retirement defined benefits credit (expense)—other than service costs						905						168						(22)						—						—						1,051
Interest expense and other charges, net						(17,024)						(2,747)						(3,804)						—						1,123						(22,452)
Allowance for borrowed funds used during construction						1,168						95						154						—						—						1,417
Interest Income						2,788						229						87						—						(1,123)						1,981
Income before income taxes						58,691						4,663						5,610						2,280						(9,725)						61,519
Income taxes						10,605						933						1,079						587						—						13,204
Net income						48,086						3,730						4,531						1,693						(9,725)						48,315
Preferred stock dividends of subsidiaries						—						134						95						—						—						229
Net income attributable to Hawaiian Electric						48,086						3,596						4,436						1,693						(9,725)						48,086
Preferred stock dividends of Hawaiian Electric						270						—						—						—						—						270
Net income for common stock						$	47,816					3,596						4,436						1,693						(9,725)						$	47,816

Condensed Consolidating Statement of Income

Three months ended March 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Revenues						$	564,180					117,609						106,789						—						—						$	788,578
Expenses
Fuel oil						210,199						31,185						42,912						—						—						284,296
Purchased power						117,518						32,056						10,243						—						—						159,817
Other operation and maintenance						90,884						24,590						28,416						—						—						143,890
Depreciation						42,004						10,964						9,844						—						—						62,812
Taxes, other than income taxes						53,409						10,957						10,042						—						—						74,408
Total expenses						514,014						109,752						101,457						—						—						725,223
Operating income						50,166						7,857						5,332						—						—						63,355
Allowance for equity funds used during construction						2,821						349						470						—						—						3,640
Equity in earnings of subsidiaries						6,024						—						—						—						(6,024)						—
Retirement defined benefits credit (expense)—other than service costs						927						168						(23)						—						—						1,072
Interest expense and other charges, net						(14,292)						(2,914)						(4,231)						—						1,452						(19,985)
Allowance for borrowed funds used during construction						1,079						107						200						—						—						1,386
Interest Income						2,663						155						66						—						(1,452)						1,432
Income before income taxes						49,388						5,722						1,814						—						(6,024)						50,900
Income taxes						9,897						1,198						85						—						—						11,180
Net income						39,491						4,524						1,729						—						(6,024)						39,720
Preferred stock dividends of subsidiaries						—						134						95						—						—						229
Net income attributable to Hawaiian Electric						39,491						4,390						1,634						—						(6,024)						39,491
Preferred stock dividends of Hawaiian Electric						270						—						—						—						—						270
Net income for common stock						$	39,221					4,390						1,634						—						(6,024)						$	39,221

Schedule of Condensed Consolidating Statement of Comprehensive Income

Condensed Consolidating Statement of Comprehensive Income

Three months ended March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Net income for common stock						$	47,816					3,596						4,436						1,693						(9,725)						$	47,816
Other comprehensive loss, net of taxes:
Retirement benefit plans:
Adjustment for amortization of net gains recognized during the period in net periodic benefit cost, net of taxes						(530)						(29)						(65)						—						94						(530)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes						483						22						54						—						(76)						483
Other comprehensive loss, net of taxes						(47)						(7)						(11)						—						18						(47)
Comprehensive income attributable to common shareholder						$	47,769					3,589						4,425						1,693						(9,707)						$	47,769

Condensed Consolidating Statement of Comprehensive Income

Three months ended March 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Net income for common stock						$	39,221					4,390						1,634						—						(6,024)						$	39,221
Other comprehensive loss, net of taxes:
Retirement benefit plans:
Adjustment for amortization of net gains recognized during the period in net periodic benefit cost, net of taxes						(508)						(38)						(59)						—						97						(508)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes						459						35						49						—						(84)						459
Other comprehensive loss, net of taxes						(49)						(3)						(10)						—						13						(49)
Comprehensive income attributable to common shareholder						$	39,172					4,387						1,624						—						(6,011)						$	39,172

Schedule of Condensed Consolidating Balance Sheet

Condensed Consolidating Balance Sheet

March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsi-diaries						Consoli- dating adjustments						Hawaiian Electric Consolidated
Assets
Property, plant and equipment
Utility property, plant and equipment
Land						$	42,860					5,645						3,514						—						—						$	52,019
Plant and equipment						5,537,541						1,512,057						1,438,311						—						—						8,487,909
Right-of-use assets - finance lease						360,270						78,377						50,757						—						—						489,404
Less accumulated depreciation						(2,068,882)						(699,329)						(613,003)						—						—						(3,381,214)
Construction in progress						290,765						32,792						52,648						—						—						376,205
Utility property, plant and equipment, net						4,162,554						929,542						932,227						—						—						6,024,323
Nonutility property, plant and equipment, less accumulated depreciation						1,146						115						1,532						—						—						2,793
Total property, plant and equipment, net						4,163,700						929,657						933,759						—						—						6,027,116
Investment in wholly owned subsidiaries, at equity						690,349						—						—						—						(690,349)						—
Current assets
Cash and cash equivalents						75,491						28,523						6,010						20,402						—						130,426
Advances to affiliates						76,200						—						—						—						(76,200)						—
Customer accounts receivable, net						12,885						5,181						7,660						165,928						—						191,654
Accrued unbilled revenues, net						2,926						2,326						253						158,701						—						164,206
Other accounts receivable, net						180,532						57,190						57,850						—						(217,285)						78,287
Fuel oil stock, at average cost						80,499						13,133						19,723						—						—						113,355
Materials and supplies, at average cost						74,662						17,211						35,432						—						—						127,305
Prepayments and other						73,005						10,034						24,959						—						(9,701)						98,297
Regulatory assets						30,929						5,907						5,915						—						—						42,751
Total current assets						607,129						139,505						157,802						345,031						(303,186)						946,281
Other long-term assets
Operating lease right-of-use assets						31,733						20,784						6,026						—						—						58,543
Regulatory assets						174,833						19,349						38,868						—						—						233,050
Defined benefit pension and other postretirement benefit plans asset						68,045						30,841						24,422						—						(12,711)						110,597
Investment in unconsolidated affiliate						287,250						—						—						—						—						287,250
Other						196,025						18,454						21,831						—						(35,003)						201,307
Total other long-term assets						757,886						89,428						91,147						—						(47,714)						890,747
Total assets						$	6,219,064					1,158,590						1,182,708						345,031						(1,041,249)						$	7,864,144

(continued)

Hawaiian Electric Company, Inc. and Subsidiaries

Condensed Consolidating Balance Sheet (continued)

March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsi-diaries						Consoli- dating adjustments						Hawaiian Electric Consolidated
Capitalization and liabilities
Capitalization
Common stock equity						$	1,492,244					247,686						287,396						155,267						(690,349)						$	1,492,244
Cumulative preferred stock—not subject to mandatory redemption						22,293						7,000						5,000						—						—						34,293
Long-term debt, net						1,308,318						244,494						256,612						—						—						1,809,424
Total capitalization						2,822,855						499,180						549,008						155,267						(690,349)						3,335,961
Current liabilities
Current portion of operating lease liabilities						5,158						7,952						3,014						—						—						16,124
Short-term borrowings from non-affiliates, net						48,738						—						—						—						—						48,738
Short-term borrowings from affiliate						—						—						76,200						—						(76,200)						—
Accounts payable						135,526						26,053						36,262						—						—						197,841
Interest and preferred dividends payable						20,728						3,598						4,251						—						(417)						28,160
Taxes accrued, including revenue taxes						164,116						32,964						29,149						1,726						(9,701)						218,254
Regulatory liabilities						9,162						14,649						4,260						—						—						28,071
Wildfire tort-related claims (Note 2)						383,000						47,875						47,875						—						—						478,750
Other						84,193						27,959						27,865						188,038						(216,868)						111,187
Total current liabilities						850,621						161,050						228,876						189,764						(303,186)						1,127,125
Deferred credits and other liabilities
Operating lease liabilities						30,820						13,187						3,306						—						—						47,313
Finance lease liabilities						339,208						76,117						49,743						—						—						465,068
Deferred income taxes						—						6,640						28,363						—						(35,003)						—
Regulatory liabilities						878,701						225,925						141,675						—						—						1,246,301
Unamortized tax credits						53,241						10,533						10,734						—						—						74,508
Defined benefit pension and other postretirement benefit plans liability						19,009						125						—						—						(12,711)						6,423
Wildfire tort-related claims (Note 2)						1,149,000						143,625						143,625						—						—						1,436,250
Other						75,609						22,208						27,378						—						—						125,195
Total deferred credits and other liabilities						2,545,588						498,360						404,824						—						(47,714)						3,401,058
Total capitalization and liabilities						$	6,219,064					1,158,590						1,182,708						345,031						(1,041,249)						$	7,864,144

Condensed Consolidating Balance Sheet

December 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsi-diaries						Consoli- dating adjustments						Hawaiian Electric Consolidated
Assets
Property, plant and equipment
Utility property, plant and equipment
Land						$	42,860					5,645						3,514						—						—						$	52,019
Plant and equipment						5,502,198						1,501,947						1,417,356						—						—						8,421,501
Finance lease right-of-use assets						360,270						36,074						50,757						—						—						447,101
Less accumulated depreciation						(2,029,719)						(691,161)						(605,744)						—						—						(3,326,624)
Construction in progress						282,150						31,341						52,218						—						—						365,709
Utility property, plant and equipment, net						4,157,759						883,846						918,101						—						—						5,959,706
Nonutility property, plant and equipment, less accumulated depreciation						1,145						115						1,532						—						—						2,792
Total property, plant and equipment, net						4,158,904						883,961						919,633						—						—						5,962,498
Investment in wholly owned subsidiaries, at equity						680,414						—						—						—						(680,414)						—
Current assets
Cash and cash equivalents						118,367						31,534						16,456						17,791						—						184,148
Advances to affiliates						62,200						—						—						—						(62,200)						—
Customer accounts receivable, net						19,050						7,245						8,941						164,662						—						199,898
Accrued unbilled revenues, net						12,738						4,046						1,890						160,047						—						178,721
Other accounts receivable, net						209,752						58,366						51,465						—						(249,946)						69,637
Fuel oil stock, at average cost						70,800						13,764						14,339						—						—						98,903
Materials and supplies, at average cost						69,602						15,506						33,358						—						—						118,466
Prepayments and other						110,516						16,662						30,747						—						(6,705)						151,220
Regulatory assets						36,520						8,211						9,164						—						—						53,895
Total current assets						709,545						155,334						166,360						342,500						(318,851)						1,054,888
Other long-term assets
Operating lease right-of-use assets						29,868						22,672						6,741						—						—						59,281
Regulatory assets						172,257						18,875						36,292						—						—						227,424
Defined benefit pension and other postretirement benefit plans asset						66,292						30,397						24,128						—						(11,998)						108,819
Other						194,006						18,612						21,702						—						(33,626)						200,694
Total other long-term assets						462,423						90,556						88,863						—						(45,624)						596,218
Total assets						$	6,011,286					1,129,851						1,174,856						342,500						(1,044,889)						$	7,613,604

(continued)

Hawaiian Electric Company, Inc. and Subsidiaries

Condensed Consolidating Balance Sheet (continued)

December 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsi-diaries						Consoli- dating adjustments						Hawaiian Electric Consolidated
Capitalization and liabilities
Capitalization
Common stock equity						$	1,156,955					243,964						282,876						153,574						(680,414)						$	1,156,955
Cumulative preferred stock—not subject to mandatory redemption						22,293						7,000						5,000						—						—						34,293
Long-term debt, net						1,353,173						244,466						256,575						—						—						1,854,214
Total capitalization						2,532,421						495,430						544,451						153,574						(680,414)						3,045,462
Current liabilities
Current portion of operating lease liabilities						4,430						7,802						2,970						—						—						15,202
Current portion of long-term debt						40,000						5,000						2,000						—						—						47,000
Short-term borrowings-non-affiliate, net						48,623						—						—						—						—						48,623
Short-term borrowings-affiliate						—						—						62,200						—						(62,200)						—
Accounts payable						137,837						27,077						32,066						—						—						196,980
Interest and preferred dividends payable						15,994						3,191						2,701						—						(350)						21,536
Taxes accrued, including revenue taxes						197,768						42,692						37,108						1,138						(6,705)						272,001
Regulatory liabilities						11,701						10,039						4,828						—						—						26,568
Wildfire tort-related claims (Note 2)						383,000						47,875						47,875						—						—						478,750
Other						103,415						35,492						43,913						187,788						(249,597)						121,011
Total current liabilities						942,768						179,168						235,661						188,926						(318,852)						1,227,671
Deferred credits and other liabilities
Operating lease liabilities						29,830						15,230						4,075						—						—						49,135
Finance lease liabilities						341,364						34,370						49,891						—						—						425,625
Deferred income taxes						—						5,368						28,257						—						(33,625)						—
Regulatory liabilities						864,259						222,834						130,422						—						—						1,217,515
Unamortized tax credits						54,950						10,757						10,969						—						—						76,676
Defined benefit pension plan liability						18,301						125						—						—						(11,998)						6,428
Wildfire tort-related claims (Note 2)						1,149,000						143,625						143,625						—						—						1,436,250
Other						78,393						22,944						27,505						—						—						128,842
Total deferred credits and other liabilities						2,536,097						455,253						394,744						—						(45,623)						3,340,471
Total capitalization and liabilities						$	6,011,286					1,129,851						1,174,856						342,500						(1,044,889)						$	7,613,604

Schedule of Condensed Consolidating Statement of Changes in Common Stock Equity

Condensed Consolidating Statement of Changes in Common Stock Equity

Three months ended March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Balance, December 31, 2024						$	1,156,955					243,964						282,876						153,574						(680,414)						$	1,156,955
Net income for common stock						47,816						3,596						4,436						1,693						(9,725)						47,816
Other comprehensive loss, net of taxes						(47)						(7)						(11)						—						18						(47)
Additional paid-in capital						287,520						133						95						—						(228)						287,520
Balance, March 31, 2025						$	1,492,244					247,686						287,396						155,267						(690,349)						$	1,492,244

Condensed Consolidating Statement of Changes in Common Stock Equity

Three months ended March 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Balance, December 31, 2023						$	2,409,110					359,790						362,344						77						(722,211)						$	2,409,110
Net income for common stock						39,221						4,390						1,634						—						(6,024)						39,221
Other comprehensive loss, net of taxes						(49)						(3)						(10)						—						13						(49)
Common stock dividends						(13,000)						—						—						—						—						(13,000)
Balance, March 31, 2024						$	2,435,282					364,177						363,968						77						(728,222)						$	2,435,282

Schedule of Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows

Three months ended March 31, 2025

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Net cash provided by operating activities						$	63,617					10,929						2,090						2,611						(233)						$	79,014
Cash flows from investing activities
Capital expenditures						(45,122)						(13,854)						(26,150)						—						—						(85,126)
Advances to affiliates						(14,000)						—						—						—						14,000						—
Other						582						164						1						—						233						980
Net cash used in investing activities						(58,540)						(13,690)						(26,149)						—						14,233						(84,146)
Cash flows from financing activities
Preferred stock dividends of Hawaiian Electric and subsidiaries						(499)						—						—						—						—						(499)
Proceeds from capital contribution from parent						270						—						—						—						—						270
Net increase in short-term borrowings from affiliate with original maturities of three months or less						—						—						14,000						—						(14,000)						—
Repayment of long-term debt						(45,000)						—						—						—						—						(45,000)
Payments of obligations under finance leases						(1,972)						(163)						(177)						—						—						(2,312)
Other						(752)						(87)						(210)						—						—						(1,049)
Net cash provided by (used in) financing activities						(47,953)						(250)						13,613						—						(14,000)						(48,590)
Net increase (decrease) in cash, cash equivalents and restricted cash						(42,876)						(3,011)						(10,446)						2,611						—						(53,722)
Cash, cash equivalents and restricted cash, beginning of period						118,367						31,534						16,456						17,791						—						184,148
Cash and cash equivalents, end of period						$	75,491					28,523						6,010						20,402						—						$	130,426

Condensed Consolidating Statement of Cash Flows

Three months ended March 31, 2024

(in thousands)						Hawaiian Electric						Hawaii Electric Light						Maui Electric						Other subsidiaries						Consolidating adjustments						Hawaiian Electric Consolidated
Net cash provided by operating activities						$	103,556					15,965						7,680						—						—						$	127,201
Cash flows from investing activities
Capital expenditures						(55,261)						(14,954)						(27,817)						—						—						(98,032)
Advances to affiliates						(22,500)						—						—						—						22,500						—
Other						(1,093)						(240)						(308)						—						—						(1,641)
Net cash used in investing activities						(78,854)						(15,194)						(28,125)						—						22,500						(99,673)
Cash flows from financing activities
Preferred stock dividends of Hawaiian Electric and subsidiaries						(499)						—						—						—						—						(499)
Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less						—						—						22,500						—						(22,500)						—
Payments of obligations under finance leases						(1,646)						(154)						—																		(1,800)
Other						(1,112)						(129)						(311)						—						—						(1,552)
Net cash provided by (used in) financing activities						(3,257)						(283)						22,189						—						(22,500)						(3,851)
Net increase in cash, cash equivalents and restricted cash						21,445						488						1,744						—						—						23,677
Cash, cash equivalents and restricted cash, beginning of period						91,755						10,658						5,587						77						—						108,077
Cash, cash equivalents and restricted cash, end of period						113,200						11,146						7,331						77						—						131,754
Less: Restricted cash						(2,000)						—						—						—						—						(2,000)
Cash and cash equivalents, end of period						$	111,200					11,146						7,331						77						—						$	129,754

X

- Definition

Electric utility subsidiary [Abstract]

+ References

No definition available.

+ Details

Name:	he_ElectricUtilitySubsidiaryAbstract
Namespace Prefix:	he_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule of Annual Decoupling Filings [Table Text Block]

+ References

No definition available.

+ Details

Name:	he_ScheduleOfAnnualDecouplingFilingsTableTextBlock
Namespace Prefix:	he_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of changes in condensed consolidating common stock equity.

+ References

No definition available.

+ Details

Name:	he_ScheduleOfCondensedConsolidatingStatementsOfChangesInCommonStockEquityTableTextBlock
Namespace Prefix:	he_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of condensed consolidating comprehensive income.

+ References

No definition available.

+ Details

Name:	he_ScheduleOfCondensedConsolidatingStatementsOfComprehensiveIncomeTableTextBlock
Namespace Prefix:	he_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule Of Public Utility, Performance Incentive Mechanism Rewards

+ References

No definition available.

+ Details

Name:	he_ScheduleOfPublicUtilityPerformanceIncentiveMechanismRewardsTableTextBlock
Namespace Prefix:	he_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	srt_ScheduleOfCondensedBalanceSheetTableTextBlock
Namespace Prefix:	srt_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	srt_ScheduleOfCondensedCashFlowStatementTableTextBlock
Namespace Prefix:	srt_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of condensed income statement, including, but not limited to, income statements of consolidated entities and consolidation eliminations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	srt_ScheduleOfCondensedIncomeStatementTableTextBlock
Namespace Prefix:	srt_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-3

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-5A

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-9

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-4

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-6

+ Details

Name:	us-gaap_ScheduleOfVariableInterestEntitiesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration